Jailbreakers everywhere should be aware that the default root password from Apple is "alpine" and presents a security threat if SSH is installed. SSH can be uninstalled or switched off when not in use, however changing the password once will solve the problem.
To change your root password and help prevent unauthorized access to your iPhone:
1. Connect to your iPhone using SSH on your computer.
2. Type 'passwd' without the quotes at the command prompt and press return.